Girls that make themselves problems to say no to go out to a guy (even of it's not a date)?

It happens so often that I suggest girls to meet (either with interesting ones, or with female colleagues without any interest), and they initially are happy, then at the last minute they cannot anymore. They simply take time instead of saying 'no'.

They also look sad when say that they can't anf propose alternative dates etc.

One colleague always reminded me that we should meet and when it was time she could not anymore.

Shall I take them seriously when they intend to meet another time or shall I understand that is a simple 'no'?

Girls that make themselves problems to say no to go out to a guy (even of it's not a date)?
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